Power Quality Improvement in Distribution Networks Using Advanced Power Electronic Transformer Topologies
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Abstract—The growing integration of renewable energy sources, nonlinear loads, and distributed generation has posed significant challenges to maintaining power quality in modern distribution networks. Conventional transformers, though reliable, lack the flexibility to mitigate issues such as voltage sag/swell, harmonics, unbalance, and reactive power disturbances. This paper presents a comprehensive study on the application of Advanced Power Electronic Transformer (PET) topologies for enhancing power quality in distribution systems. The proposed PET architecture incorporates multi-level converter stages with bidirectional power flow control, enabling dynamic voltage regulation, harmonic compensation, and load balancing. Simulation models are developed in MATLAB/Simulink to evaluate the performance of modular PET configurations under varying load and grid conditions. Comparative analysis with traditional transformer systems demonstrates significant improvements in voltage profile, total harmonic distortion (THD), and system efficiency. The study highlights the potential of PET-based solutions as a next-generation approach for intelligent, reliable, and sustainable distribution network operation.
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